From: "Peña, Botp" <botp@...>
Date: 2007-07-02T11:52:38+09:00
Subject: Re: Test equality of each element in an array

From: list-bounce@example.com :
# if extNot2move.include?(File.extname(fn).downcase) # Does not work
# 
#  if !['.jpg', '.pdf', 
# '.mrw','.png','.psd','.tif','.gif','.pict'].include?(File.extn
# ame(fn).downcase) 
# # seems to work
# I need to check the logic of what I'm doing after the test. I've got 
# myself lost in trying out so many variations.

careful w your naming. You're using extNot2move, so that would mean, "the extensions of files you would NOT want to move". The File#extname method also returns the prefix dot "." as part of the extension, so you need to adjust your extension names.

try something like, 
    ext = %w(jpg pdf mrw png pdf tif)  # it's easy to add here
    extNot2move = ext.map{|e| "."+e}   # this handles the needed "."

and then your test would be any of the ff:

   1) if ! extNot2move.include?(File.extname(fn).downcase)
   2) if not extNot2move.include?(File.extname(fn).downcase)
   3) unless extNot2move.include?(File.extname(fn).downcase)

   i'd prefer the 3rd style 

on my case, i find myself usually asking the q the other way around, like "is this element in this set?"

you may try creating an #in? method
something like

> module Enumerable
>  def in?(container)
>    container.include?(self)
>  end
> end

or

> module Enumerable
>   def in?(container)
>      container.any?{|elt| elt==self}
>   end
> end

> "jpg".in? extNot2move
=> false
> ".jpg".in? extNot2move
=> true
> ".jgg".in? extNot2move
=> false
> File.extname("text.JPG").downcase.in? extNot2move
=> true
> File.extname("text.JGG").downcase.in? extNot2move
=> false

kind regards -botp